Developing news media literacy skills is recognized as an important part of becoming an informed citizen, but not enough research examines how growth in media literacy differs by individual characteristics. Using a panel study of undergraduate students, we examine which predispositions predict growth in news media literacy beliefs over the semester. We then test whether growth in news media literacy leads individuals to more highly value and engage in heterogeneous political discussion, a critical part of a functioning democracy. Our results suggest some individuals experience more growth in news media literacy, and that growth contributes to democratic attitudes and behaviors.